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Be it known that I, STEPHEN I). RUGGLES, of Boston, in the county of Suffolk, and State of Massachusetts, have invented certain new and useful Improvements in Steam Boilers; and I do hereby declare the following to be a full, clear, and exact description ot' the same, rct'erc'nce being had to the accompanying drawings, making a part of this specification, in which- Figure 1 represents an external view of a boiler in which `my proposed invention is embraced.

Figure 2 represent-s a longitudinal vertical section through the same; and

Figure 3 represents a vertical cross-section thereof.

Similar letters of reference, where they occur in the separate igures, denote like parts of the boiler in all' the drawings. l

My invention consists in arranging the steam chamber and generator of aA closed steam boiler at or near the bottom of the boiler, so that the steam generated may pass immediately from .the Vpoint where it is gene-v rated into the steam chamber, and without passing up through a column ot' wat-er, which impairs its elastic force.

To enable others skilled in the art to make and use my invention, I will proceed to describe the same with reference to the drawings.

A represents the shell of `a boiler, which may be of any suitable size, shape, or form, and either horizontal or vertical, as may be preferred. Within the boiler, and at or near the bottom thereof, I arrange a steam generater and chamber B, which is made'by a partition plate, a, which divides the steam chamber B from the Water space C, but stil-l leaves them connected by thc narrow openings at c, so that the water from G may How into the steam generator or chamber B, and the steam, as it is formed, rise into the upper part of the chamber B, from whence it may be taken by the pipe b to the steam cylinder or other place where it is tobe used. 02 @Zd are series of pipes extending from the outside of the boiler into the steam chamber Band should be furnished with trycocks for the purpose of ascertaining the height or condition of the steam or water therein, said pipes entering the steam chamber or generator at different heights therein for that purpose. e e e are a series of pipes, extending from the outside of the boiler into the water space, and at varied heights therein, and should be furnished also with try-cooks to ascertain' the height and condition of the water therein. fis a pipe extend- 4ing from the outside ot' the boiler into the upper part of the water space; and this pipe may have a safetyvalve applied to it, and a blow-oft cock; or the safety-valve may he arranged on top of the boiler in the usual well-known way.

The steam generated in B, where'therc will be but a-thin or shallow film yof water, will rise therein to the upper part of the steam chamber, and may be carried off bythe pipo b as fast as generated, the supply of water being kept up from the Water space C through the narrow slots or spaces e. By this construction the particles of steam, as they are generated, do not have to rise through the water to enter the steam chamber, or become saturated, or rendered inelastic, by so passing up through the column of water, but are kept dry and in their most effective condition.

In my construction the steam chamber is underneath the water in .the boiler, instead of above it, as is usually the case in boilers. So, long as the steam is drawn from the chamber so long will all the Steam made be retained therein. But if tlreengine be stopped and the fires kept up, and the'steam continue to be generated, the pressure in the steam generator may become so great as to lcause the steam to-pass through the open ings c, and thence rise up through the water, and remain in the upper part of'the water ,chamber C. And when the steam became excessive it would blow cti' at the safety-valve, o1' be drawn oili through the pipe f. But when the engine is again started, and the steam .in the chamber Btis reduced to its regular working pressure again, it would be necessary to let oh" enough steam from the upper part of the chamber C to allow the water to rise into the water chamber, and of course it would fall correspondingly in the steam chamber B to the desired elevation, when the boiler would again properly act. But the escape of the' steam from the chamber to andl above the water can -onlyeecur when the engine is stopped, or when the steam is not used as fast as it is made, either of which will cause it to escape up through the water, and thence out by the safety-valve.

Whatl claim as my invention, and desire to secure by Letters Patent, is

Arranging a steam chamber and generator at or near the bottom, of a closed steam boiler, as and for the purpose substantially as herein described.

STEPHEN P. RUGGLES.

Witnesses:

S. FRANK Caooksrr, H.l L. RoBINsoN.- 

